The Master Builder. Ironically, Snakehammer, the ingenious goblin inventor, loses his memory through a stupid coincidence. When he wakes up from his faint, he finds himself among the trolls. They are happy to have a brilliant scientist in their midst, because they hope to finally be able to transform the Mittelland into a gigantic metropolis made of stone with the help of Snakehammer. But a combined effort of elves and goblins, led by Thalia and Daiman, can prevent the worst...